Five NHL Teams Already Looking Vulnerable After Free Agency's Opening Act

Early free agency moves have exposed some serious roster weaknesses across the league, and five franchises are already looking like they might be in trouble come October. The decisions made in the first week of July have created a clear separation between contenders and pretenders. Some teams' front offices appear to be playing checkers while others are playing chess. The salary cap constraints and available talent pool have created a fascinating hierarchy that could define the entire season.